Maximize/Minimize Screen Brightness in Android Java

In Android, you can programmatically adjust the screen brightness to either maximize or minimize its intensity. This functionality can be particularly useful in applications where you want to provide users with control over their device’s display brightness.

1. Manifest.xml add permissions

<uses-permission android:name="android.permission.WRITE_SETTINGS"
tools:ignore="ProtectedPermissions" />

2. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_margin="30dp"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/turn_off_screen_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="Turn Off Screen"
        tools:ignore="MissingConstraints" />

    <Button
        android:id="@+id/turn_on_screen_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/turn_off_screen_button"
        android:layout_centerHorizontal="true"
        android:text="Turn On Screen"
        tools:ignore="MissingConstraints" />
</LinearLayout>